A bright object very high in the sky which moved too fast to be a manmade craft, zig zaged like a bug and was bigger than a planet appe

A movement of what looked like a star caught my eye in the sky just west of Lake Tahoe at about 12:20pm. I and friend watched it for about 40 minutes. It was brighter than a star or a planet, and larger than both. It was very high but looked like it was in our atmosphere. You could not see a shape to the craft but it did appear to have lights that changed colors from different greens to blues and purples. The glow to a star is hazy, but on this craft it seemed to have beams of light projecting out that moved in a circle. The craft moved like nothing I had ever seen manmade. It stayed in a general area, but moved as a bug would, zig zag motions. It moved incredibly fast from spot to spot, stopping occasionally, and then continuing to move. We stopped watching the craft after it seemed to stop moving for about 10 minutes. We checked the next night at the same time but the craft was not there in relation to two stars it had stayed with in a changing triangular shape.